avNav.glade  - from Willow Garage AvNav project
marnav.glade - modeled after the GIMP's toolbox; 
               GtkWrapBox from the Gimp (also used in Nautilus) seems useful to hold the toolbuttons
               See http://nautilus.sourcearchive.com/documentation/2.14.3-11/dir_3e9cf7138a467f73f07101fdef8c554b.html

